.\protoc-3.20.1-windows-x86_64.exe --grpc_out=..\src\main\java --plugin=protoc-gen-grpc=.\protoc-gen-grpc-java-1.45.1-windows-x86_64.exe helloworld.proto
.\protoc-3.20.1-windows-x86_64.exe --java_out=..\src\main\java helloworld.proto